network: Configure device names from /var/ipfire/ethernet/settings

Instead of creating a copy of the configuration values and
for better extensibility, we will have udev execute a script
that parses /var/ipfire/ethernet/settings and will return the
correct name of the corresponding device (green0, blue0, ...).

src/initscripts/init.d/network-trigger

@@ -0,0 +1,22 @@
+#!/bin/sh
+########################################################################
+# Begin $rc_base/init.d/network-trigger
+########################################################################
+
+. /etc/sysconfig/rc
+. ${rc_functions}
+
+case "${1}" in
+	start)
+		boot_mesg "Triggering network devices..."
+		udevadm trigger --action="add" --subsystem-match="net"
+		evaluate_retval
+		;;
+
+	*)
+		echo "Usage: ${0} {start}"
+		exit 1
+		;;
+esac
+
+# End $rc_base/init.d/network-trigger